In this task, you are given an article. Your task is to summarize the article in a sentence.

The eight-times British champions have been told they cannot compete in the restructured Premiership in 2017 as they no longer have a proper home.
Denmark's Olsen, one of the game's greats, says English speedway is 'going downhill' and fears for the future.
"I don't think it's looking that good, particularly in England," Olsen said.
"Some other countries, they're booming," he told BBC Coventry & Warwickshire. "But, over the years, English speedway has been going downhill a bit.
"It has been sad to see. But I am also very pleased that I was a part of it when it was so great. I have fantastic memories of when we won the league.
The 70-year-old former Newcastle, Wolves and Bees rider added: "When I arrived, there were 22 clubs in the league. We played just once at each others' tracks, home and away.
"But now some of the tracks are not up to shape. Sadly, there has not been enough investment into the stadiums.
"England is still creating world champions like Tai Woffinden, at Wolves, so I don't know what's happened."
The British Speedway Promoters Association, who made the decision to put the Bees' licence 'on ice', are still optimistic about the club's future.
"I think there could be a new venue found, I really do," BSPA chairman Keith Chapman told BBC Coventry & Warwickshire.
"Who knows what could happen? If the right person could come in and bring it back to life, Brandon is one of the best venues in the country."
Coventry's problems are the latest to affect the club speedway scene.
Manchester side Belle Vue are on the up again after moving into the £8m National Speedway Stadium in March 2016, before being taken over last week.
But, although the Midlands can boast Wolverhampton Wolves as reigning league champions, having won the final Elite League title in 2016, the region has suffered.
Cradley Heathens, the 1981 and 1983 league champions, folded in 1996. And, although they reformed in 2010, they have been unable to secure their own permanent home.
Neighbours Birmingham have suffered financial problems in recent seasons, which cost them their place in the old Elite League.
Former world champion Ole Olsen is worried for the future of speedway in this country following the problems suffered by his old club Coventry Bees.

Zaur Dadayev was jailed for 20 years by a Moscow military court while the others were given 11 to 19 years.
A vocal critic of President Vladimir Putin, Nemtsov, 55, was shot dead in February 2015.
His family fear the person who ordered the murder may never be caught.
They say until then the case will not be solved. Their lawyers believe senior figures within Chechnya who are loyal to the Russian leader may be behind the killing.
By Sarah Rainsford, BBC News, Moscow
The small military courtroom was packed for the verdict, the men themselves in handcuffs inside a glass cage that soon began to steam up from the heat.
Everyone stood as the judge took half an hour to read out his verdict.
The five men were passive at first. Then they smirked and laughed openly as their verdicts were announced.
They had made their final speeches to the court on Wednesday, warning that people would "answer" for imprisoning them unjustly, and proclaiming that only Allah would be their judge.
As the guilty verdicts began to come in, one misspelt "A LIE" in the steam in front of him.
Outside in the drizzling rain, lawyers representing Boris Nemtsov's family pointed out that even the convicted killer was not given a life sentence - he got 20 years. But, most importantly, the person who hired the five to kill has still not been found.
Dadayev is a former member of the elite Northern Battalion in the Northern Caucasus republic of Chechnya, a unit that came under the command of Chechen strongman Ramzan Kadyrov.
The court stripped Dadayev of his rank of lieutenant and removed an earlier award for bravery, Ria Novosti reported. Although he confessed to the killing, Russia's human rights council said that was likely to have happened under torture.
Two brothers, Anzor and Shadid Gubashev, were jailed for 19 and 16 years respectively. While Dadayev was said to have fired the gun, Anzor Gubashev was accused of driving him to and from the crime scene.
Tamerlan Eskerkhanov was given 14 years and Khamzat Bakhayev 11. They and Shadid Gubashev were convicted of preparing the murder.
Another suspect said to have taken part in the killing, Beslan Shavanov, died as police tried to arrest him.
Boris Nemtsov rose to political prominence in the 1990s as a liberal reformer and deputy prime minister under President Boris Yeltsin.
His political fortunes waned when Vladimir Putin took over the presidency but he became an important opposition force as anti-Putin protests erupted in 2011.
He was openly critical of Russia's involvement in eastern Ukraine after the annexation of Crimea in 2014.
On the evening he was shot, in February 2015, he had given a radio interview accusing the president of lying over Russia's military takeover of Crimea and backing a protest march two days' later.
As he and his Ukrainian girlfriend crossed the Bolshoi Moskvoretsky bridge before midnight he was shot several times in the back.
Prosecutors said Nemtsov's killers had been promised 15m roubles ($249,169.44) to carry out the killing.
A Chechen gunman and four accomplices have been given long jail sentences for the killing of leading Russian opposition figure Boris Nemtsov near the Kremlin.

Deputy director David Lipton called for urgent steps to boost global demand.
"We are clearly at a delicate juncture," he said in a speech to the National Association for Business Economics in Washington on Tuesday.
"The IMF's latest reading of the global economy shows once again a weakening baseline," he warned.
The comments come after weaker-than-expected trade figures from China showing that exports in February plunged by a quarter from a year ago.
With the world's second largest economy often referred to as as "the engine of global growth", weaker global demand for its goods is read as an indicator of the general global economic climate.
The IMF has already said it is likely to downgrade its current forecast of 3.4% for global growth when it releases its economic predictions in April.
Last month, the international lender had warned that the world economy was "highly vulnerable" and called for new efforts to spur growth.
In a report ahead of last month's Shanghai G20 meeting, the IMF said the group should plan a co-ordinated stimulus programme as world growth had slowed and could be derailed by market turbulence, the oil price crash and geopolitical conflicts.
In his Washington speech, Mr Lipton said "the burden to lift growth falls more squarely on advanced economies" which have fiscal room to move.
"The downside risks are clearly much more pronounced than before, and the case for more forceful and concerted policy action, has become more compelling."
"Moreover, risks have increased further, with volatile financial markets and low commodity prices creating fresh concerns about the health of the global economy," he added.
The downbeat picture is one that has continuing ramifications for businesses and industries that bet on China's growth story.
A slew of weak economic data has recently added to those concerns and US ratings agency Moody's has downgraded its outlook for China from "stable" to "negative".
There also is concern over rising unemployment as Beijing seeks to gradually shift its economy from overdependence on manufacturing and industry towards more services and consumer spending.
China's economy is growing at the slowest rate in 25 years, and the slowdown has created considerable uncertainty in financial markets around the world and led to sharp falls in commodity prices.

The International Monetary Fund (IMF) has warned that the global economy faces a growing "risk of economic derailment."

